The C(2)$^1\Pi_u$ state in Rb$_2$. Observation and deperturbation
| Autor: | Pashov, Asen, Kowalczyk, Pawel, Szczepkowski, Jacek, Jastrzebski, Wlodzimierz |
|---|---|
| Rok vydání: | 2022 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1016/j.saa.2022.121624 |
| Popis: | We report a systematic study of the C(2)$^1\Pi_u$ electronic state in rubidium dimer, observed in polarization labelling spectroscopy experiment through the C $\leftarrow$ X$^{1}\Sigma^{+}_{g}$ transitions recorded under rotational resolution in two isotopologues $^{85}$Rb$_2$ and $^{85}$Rb$^{87}$Rb. Regularity of the vibrational progressions was distorted by numerous interactions with the surrounding 2$^1\Sigma^{+}_{\mathrm{u}}$, 2$^3\Pi_{\mathrm{u}}$ and 3$^3\Sigma^{+}_{\mathrm{u}}$ states. Deperturbation was performed by coupled-channels analysis taking into account spin-orbit and rotational interactions. Potential energy curves and parameters describing the off-diagonal matrix elements were determined as functions of internuclear distance. About 3000 line frequencies from the present study are reproduced with a standard deviation of 0.07 cm$^{-1}$, in agreement with the experimental accuracy. Along with this, the model is consistent with all high resolution experimental data on the involved electronic states, available in the literature. Comment: Supplementary data can be found at the http://dimer.ifpan.edu.pl |
| Databáze: | arXiv |
| Externí odkaz: |
|